不同土壤肥力对野生荞麦光合特性的影响

通过对野生荞麦齿翅野荞和金荞麦与栽培苦荞川荞1号在四种不同肥力土壤上净光合速率、叶绿素含量和叶面积的研究结果表明：虽然野生荞麦是耐瘠植物，能在贫瘠的土地上正常生长，但更适合在肥力好的土壤中生长；野生金荞与栽培苦荞有很多相似之处，但光合速率值低于对照且高峰值出现时期较迟，叶绿素含量变化幅度较大且出现高峰值的时间比对照早。

Effects of Different Soil Fertilities on Photosynthesis Characters ofWild Buckwheat

The photosynthetic rate, chlorophyll content and leaf area index of three buckwheat of F.gracilipes Var., F.cymosum and Chuanqiao-1 under four different soil fertilities were studied ,the results indicated that good soil fertility fit the growth of the wild buckwheat, although it was soil-barren plant. There was a great similarity between wild F.cymosum and Chuanqiao-1 of tartarian buckwheat.Compared with those of Chuanqiao-1 of tartarian buckwheat, the photosynthetic rate of wild F.cymosum was higher and peak value appeared late ,and the range of vary was greater and peak value appeared early.